Process of making enameled vessels.



, No. 875,281. l FATENTED 13130.31, 1907.

H. T. MGGREGOR. A

PROCESS 0F MAKING BNAMELED VESSBLS.

' APPLICATION FILED SEPT. 6, 1906.

an interior coat ne. efswsi,

Speciz'icaton of Letters Patent.

Patented liec. 3l, 190'?.

Application .filed September 6, 1906. Serlalllo. 333,511.

To all whom it may concern:

Be it'lznown that i, Henna Triennali MCGREGDR, a citizen ol the 'United States, residing at liheeling, in the county of Uhio and State ol lil/vest Virginia, have invented certain new' and useful improvements in Processes of ll'laliingg an lnarneled Vessel, oil which the folli'nvingl is e. specification.

'.fhe object of this invention is toprovide a vessel ha' a polished outer surface and rel or so disiotect the interior orp the vessel n n protected troni frac ture by the metallic run, vflange or beading of the vessel.

' in the preferred embodiment o1" the invention the exterior surface olt the vessel is ro vided with a coating of electrodeposited metal, said electrodeposited metal extending over the rim, llange er beailing and to the upper edge of the enainel or glaze.

Vv'ith these objects in view my invention comprises process of inaln'ne1 an enameled vessel.

For a lull understanding ci the invention reference is made to the aceompanying; drawing wherein the ligure an elevation partly in section of a cow-red vessel or pot embodying the invention.

The vessel shown comprises a body poi.- tion l. of steel or iron, illustrated 'as provided with an outwardly extending [lange 2 and a beading i). lit will be understood that the vessel will be adapted in lorm to the purpose for which it is designed. el; represents the interior coating of enamel or glaze, said coat ing terminating as indicated at 5 in. a line which is below the rim, llang'e or beading olt the body portion. l have observed that in the ol' vessels in which the interior enamel extends substantially to the top ol the Velscl there is a liability to chipping or fracture of thc enamel, more particularly at or near its upper edge, such chipping' or Vracture beingr duo usually to a blow from the cover in the case oll covered vessels, or to an accidental blow or deformation ol the vessel in the case of uncovered vessels; and the object in terminating the enamel'bclow the upper edge of the vessel is to all'ord a protective rim, flange or beading ol" metal, and to the extent above indicated.

n the drawingT l have also illustrated a cover 7, embodying the invention and having a retleXed rim or flange 8 corresponding in forni to the metallic rim?. of the vessel and adapted to rest thereon. This cover may be provided if desired with an interior coating 9 oi enamel or glaze, and 'with an exterior electrodeposit 10, said. electrodeposit preferably extending over the edge ot' the cover and into the interior. shown.

My process is'prelierably carried out snbe I stantiallY as follows: A suitable blank of steel lor iron is spun. or Stamped intothe desired form, pickled, cleaned and dried, and then coated. with an enamel composition to Before liring the enamel, and if desired before applying the enamel con'iposition, all exposed portions ol" the metal are carefully coated. with a niaterial which will elleetually prevent oxidation ol the metal d tiring iiring, the oE ct of this coatiini` Vbeim:r to insure that the metallic portions shall remain in a condition suitable lor burnishingjror lor electroplatinv. The vessel is then ilred in the usual manner. vlt

desired further coats of enamel may be applied and lired as is Well understood, the inctallic su'rl'aee being protected throughout the entire operation. When the cnameling is completed the metallic portions of thc surface are cleaned and burnished in any suitable manner, and are preferably then electroplated as above described.

Any suitable material may be employedfor preserving theI metallic surfaces from oxidation during lhe operation ol firing, a snitable tmaterial bcinpfa paste, paint or lorm prepared l'rom asbestos libers.

l, claim:

l. 'l`he process ol' making an enameled vessel havingr a polished exterior surface which consists in applying enamel composition to the interior ol a metallic body, applying:r a`

heatd'esisting` coatingjr to the exposed portions of the body, firing the enamel, and reing said heat-resisting coting, and electro 1,0

moving said heet-resisting eoeting,si1bstan plating the metallic surface of the vessel, ,i

tielly as described. substantially as described.

2. The process of making an enameled Ves- In testimony whereofI I aHiX my signature A 5-sel having a polished exterior surface which in presence of two Witnesses.

consists in applying enamel composition t0 HOMER THOBURNjMGGREGOR.' the interior of a metallic body, .applyinga Witnesses: heat-resisting coating to the exposed por- CLINTON4 P. TOWNSEND, ionsof the ody, firing the enamel, remov- CEAS. H. POTTER. 

